### Abstract

We have measured the thermal conductivity along the a-axis parallel to the one-dimensional (1D) spin chain, κ_{a}, of the Haldane gap system Y_{2} BaNiO_{5}. As a result, we have observed thermal conductivity due to spins, κ_{sp}, as large as at least 10 W / K m around 100 K corresponding to the magnitude of the Haldane gap. The large κ_{sp} may be due to the large bandwidth of spin excitations. Otherwise, it may be attributed to the ballistic thermal conduction due to spins which is theoretically expected in Haldane gap systems with the spin quantum number S = 1.

Original language | English |
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Pages (from-to) | 1212-1214 |

Number of pages | 3 |

Journal | Journal of Magnetism and Magnetic Materials |

Volume | 310 |

Issue number | 2 SUPPL. PART 2 |

DOIs | |

Publication status | Published - 2007 Mar 1 |

### Keywords

- Haldane gap
- Low-dimensional spin system
- Thermal conductivity

### ASJC Scopus subject areas

- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics

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## Cite this

Kawamata, T., Miyajima, Y., Takahashi, N., Noji, T., & Koike, Y. (2007). Large thermal conductivity due to spins in the Haldane gap system Y

_{2}BaNiO_{5}.*Journal of Magnetism and Magnetic Materials*,*310*(2 SUPPL. PART 2), 1212-1214. https://doi.org/10.1016/j.jmmm.2006.10.326